Regarding the support I can say it's excellent! Had an issue with a faulty zip file and a small bug, all sorted within half an hour.
Very good experience!
First it is incredibly flexible. In the concept I’m renting out, Camping Rafts, a regular setup of a booking system for hotels or cottages didn’t work. Jomres is highly customizable and the beautiful part is that when you use it customized, this won’t be lost when upgrading to the newest version. So you can have Jomres cut exactly to your needs and still be up-to-date.
Second Jomres comes with lots and lots of features, like different types of tariff-setups, single-room-property features, smart discount system and the possibility of customised payment gateways besides the standard PayPal gateway. So if you have a hotel, a cottage, a camping raft, a camping or a holiday portal, Jomres will fit your needs, though it might need some effort.
My third and most important comment will be about the level of service that comes with the extension. I like people who run an honest business by selling a great product but I love people who do this AND provide support in a way that is constructive, friendly and fast. These are all elements Vince and Hazel excel in.
So, long story short...
A great extension when you need a booking system for whatever business you're running with the best support I've experienced yet. Besides that for lifetime free upgrades and support I think it sells to cheap.